dissolve app/ into repo root (D-056)

Single Flutter package at the repo root. All code, tests, assets,
and platform directories moved from app/ to root. Package renamed
from clide_app to clide — all imports rewritten. Merged pubspec
combines core (ffi) and app (flutter, yaml, xterm) dependencies.
Makefile simplified: no APP_PRESENT conditionals, no cd, no daemon
lifecycle. 317 tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

test/kernel/src/commands/keybindings_test.dart

@@ -0,0 +1,45 @@
+import 'package:clide/kernel/kernel.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('Keybinding.parse + equality', () {
+    test('parses single-key bindings', () {
+      final k = Keybinding.parse('g');
+      expect(k.key, 'g');
+      expect(k.modifiers, isEmpty);
+    });
+
+    test('parses modifier chains case-insensitively', () {
+      final a = Keybinding.parse('Ctrl+Shift+G');
+      final b = Keybinding.parse('shift+ctrl+g');
+      expect(a, equals(b));
+      expect(a.canonical, 'ctrl+shift+g');
+    });
+
+    test('rejects empty string', () {
+      expect(() => Keybinding.parse(''), throwsA(isA<ArgumentError>()));
+    });
+
+    test('canonical modifier order is deterministic', () {
+      final k = Keybinding.parse('alt+ctrl+shift+x');
+      expect(k.modifiers, ['alt', 'ctrl', 'shift']);
+    });
+  });
+
+  group('KeybindingResolver', () {
+    test('bind + lookup round-trips', () {
+      final r = KeybindingResolver();
+      r.bind(Keybinding.parse('ctrl+shift+g'), 'git.commit');
+      expect(r.commandFor(Keybinding.parse('ctrl+shift+g')), 'git.commit');
+      expect(r.commandFor(Keybinding.parse('ctrl+g')), isNull);
+    });
+
+    test('unbind removes the mapping', () {
+      final r = KeybindingResolver();
+      final k = Keybinding.parse('ctrl+p');
+      r.bind(k, 'palette.open');
+      r.unbind(k);
+      expect(r.commandFor(k), isNull);
+    });
+  });
+}